• Title/Summary/Keyword: graphical estimation

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A Study on the Estimation of Earth Resistivity using Backpropagation Algorithm (역전파알고리즘을 이용한 대피저항율추정에 관한 연구)

  • Park, P.K.;Yu, B.H.;Seok, J.W.;Choi, J.K.;Jung, G.J.;Kim, J.H.
    • Proceedings of the KIEE Conference
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    • 1997.11a
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    • pp.203-205
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    • 1997
  • In this paper, we present a useful method of estimating earth resistivity using BP algorithm in Neural-Networks. From this method, equivalent earth resistivity(EER) can be obtained directly using training data composed of field-measured apparent resistivity and probe distance. This approach can reduce errors which is conventionally raised from manual operation of calculating EER. To evaluate its accuracy and convenience, the result of proposed method is compared to that of conventional methods, graphical($\rho$-a graph) and numerical(CDEGS program), respectively.

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System Development for the estimation of Pollutant Loads on Reservoir

  • Shim, Soon-Bo;Lee, Yo-Sang;Koh, Deuk-Koo
    • Korean Journal of Hydrosciences
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    • v.10
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    • pp.35-46
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    • 1999
  • An integrated system of GIS and water quality model was suggested including the pollutant loads from the watershed. The developed system consits of two parts. First part is the information on landuse and several surface factors concerning the overland flow processes of water and pollutants. Second part is the modeling modules which include storm event pollutant load model(SEPLM), non-storm event pollutant load model(NSPLM), and river water quality simulation model(RWQSM). Models can calculate the pollutant load from the study area. The databases and models are linked through the interface modules resided in the overall system, which incorporate the graphical display modules and the operating scheme for the optimal use of the system. The developed system was applied to the Chungju multi-purpose reservoir to estimate the pollutant load during the four selected rainfall events between 1991 and 1993, based upon monthly basis and seasonal basis in drought flow, low flow, normal flow and wet flow.

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Software Design Methodology of OFDM DVB-T Receiver using DSP-based Platform (DSP 기반 플랫폼을 이용한 OFDM DVB-T 반송파 복원부의 소프트웨어 설계 방법)

  • 신정헌;유형석;윤주현;박찬섭;정해주;조준동
    • Proceedings of the IEEK Conference
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    • 2003.11c
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    • pp.55-59
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    • 2003
  • In this paper, we estimate the performance requirements of general-purpose DSP for Carrier Recovery of OFDM DVB-T receiver. Firstly, we transported the designed fixed-point OFDM DVB-T model to a floating-point software model written in C. Then, we measured the number of instruction cycles required for operation of Carrier Recovery in time. We use SignalMaster$\^$TM/ DSP platform of LYRtech Inc. as a environment of estimation, and Simulink$\^$TM/ as a graphical interface, Code Composer StudioTM of TI as profiler and compiler, and SPW$\^$TM/ for presenting functional reliability and comparing the performance distortion with fixed-point model. As a result, we show the required number of DSPs in our DSP-based system, and introduce the need of Multi-DSP-based system.

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Safety Analysis using bayesian approach (베이지안 기법을 이용한 안전사고 예측기법)

  • Yang, Hee-Joong
    • Journal of the Korea Safety Management & Science
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    • v.9 no.5
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    • pp.1-5
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    • 2007
  • We construct the procedure to predict safety accidents following Bayesian approach. We make a model that can utilize the data to predict other levels of accidents. An event tree model which is a frequently used graphical tool in describing accident initiation and escalation to more severe accident is transformed into an influence diagram model. Prior distributions for accident occurrence rate and probabilities to escalating to more severe accidents are assumed and likelihood of number of accidents in a given period of time is assessed. And then posterior distributions are obtained based on observed data. We also points out the advantages of the bayesian approach that estimates the whole distribution of accident rate over the classical point estimation.

Efficient 3D Scene Labeling using Object Detectors & Location Prior Maps (물체 탐지기와 위치 사전 확률 지도를 이용한 효율적인 3차원 장면 레이블링)

  • Kim, Joo-Hee;Kim, In-Cheol
    • Journal of Institute of Control, Robotics and Systems
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    • v.21 no.11
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    • pp.996-1002
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    • 2015
  • In this paper, we present an effective system for the 3D scene labeling of objects from RGB-D videos. Our system uses a Markov Random Field (MRF) over a voxel representation of the 3D scene. In order to estimate the correct label of each voxel, the probabilistic graphical model integrates both scores from sliding window-based object detectors and also from object location prior maps. Both the object detectors and the location prior maps are pre-trained from manually labeled RGB-D images. Additionally, the model integrates the scores from considering the geometric constraints between adjacent voxels in the label estimation. We show excellent experimental results for the RGB-D Scenes Dataset built by the University of Washington, in which each indoor scene contains tabletop objects.

A Visualization Tool for Similarity Estimation of Sequence Data (서열 정보의 유사성 검사를 위한 가시화 도구)

  • 황미녕;강영민;조환규
    • Proceedings of the Korean Information Science Society Conference
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    • 2000.10b
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    • pp.559-561
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    • 2000
  • 현재 활발한 연구가 진행중인 유전자 분석과 같은 분야에서는 유전자 염기 서열과 같은 대규모 서열 정보들에 대한 효과적인 분석기술을 요구하고 있다. 본 논문은 이러한 서열 정보들 사이의 유사도를 측정하고 분석하는 작업을 효과적으로 지원하기 위한 가시화 도구의 개발을 다룬다. 본 논문에서 사용하는 유사도 가시화 기법은 유전자 정보의 유사도 가시화를 위해 제안되었던 시각적 점-행렬 도면(Graphical Dot-Matrix Plots) 기법을 이용하는데, 이 시각적 점-행렬 도면 기법은 비교 대상이 되는 서열 정보의 크기가 커지면 효율적으로 가시화하기가 힘들다는 단점을 가진다. 본 논문은 시각적 점-행렬 도면 기법의 이러한 문제를 해결하기 위해 서열 정보 유사도 비교 결과를 화면의 해상도 내에서 표현할 수 있도록 데이터를 영역별로 분할하고 각 영역별 일치도를 이분 그래프(bipartite graph)의 최대 평면 일치(maximal planar matching)를 이용하여 결정하고 이를 하나의 화소(pixel)로 출력하는 기법을 제안한다.

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Implementation for Partial Discharge Detection using Ultrasonic Signal (초음파 신호를 이용한 부분방전 검출 장치 개발에 관한 연구)

  • Choi, S.A.;Chung, H.H.;Kwak, H.R.;Kim, J.C.;Chung, S.J.;Yoon, J.Y.
    • Proceedings of the KIEE Conference
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    • 1993.07b
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    • pp.588-590
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    • 1993
  • This paper presents a diagnostic technique using ultrasonic for operating power transformer. Two methods are used as a base for detecting a partial discharge. One is a analysis of PD trend using counted ultrasonic signal, the other is a estimation of PD location source using cross-correlation. In this paper we implement detection equipment of partial discharge in power transformer. The desired system is utilized to two methods for PD detection and operated by graphical user interface(GUI). The results of test showed that the system can be adopted to real power transformer.

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Development of MATLAB GUI Based Software for Monitoring Ionospheric Disturbances

  • Kim, Bu-Gyeom;Kang, Seonho;Han, Deokhwa;Song, Junesol;So, Hyoungmin;Kim, Kap Jin;Kee, Changdon
    • Journal of Positioning, Navigation, and Timing
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    • v.8 no.2
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    • pp.69-77
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    • 2019
  • This study introduces MATLAB Graphical User Interface (GUI)-based software to monitor ionospheric disturbances. This software detects ionospheric disturbances using Global Positioning System (GPS) and Global Navigation Satellite System (GLONASS) measurements, and estimates a location of the disturbance source through the detected disturbance. In addition, this software includes a sky plot making function and frequency analysis function through wavelet transform. To evaluate the performance of the developed software, data of 2011 Tohoku earthquake in Japan were analyzed by using the software. The analysis results verified that the ionospheric disturbances were detected through GPS and GLONASS measurements, and the location of the disturbance source was estimated through the detected disturbance.

Controlling of ring based structure of rotating FG shell: Frequency distribution

  • Hussain, Muzamal
    • Advances in concrete construction
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    • v.14 no.1
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    • pp.35-43
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    • 2022
  • Based on novel Galerkin's technique, the theoretical study gives a prediction to estimate the vibrations of FG rotating cylindrical shell. Terms of ring supports have been introduced by a polynomial function. Three different laws of volume fraction are utilized for the vibration of cylindrical shells. Variation frequencies with the locations of ring supports have been analyzed and these ring supports are placed round the circumferential direction. The base of this approach is an approximate estimation of eigenvalues of proper functions which are the results of solutions of vibrating equation. Each longitudinal wave number corresponds to a particular boundary condition. The results are given in tabular and graphical forms. By increasing different value of height-to-radius ratio, the resulting backward and forward frequencies increase and frequencies decrease on increasing length-to-radius ratio. There is a new form of frequencies is obtained for different positions of ring supports, which is bell shaped. Moreover, on increasing the rotating speed, the backward frequencies increases and forward frequencies decreases.

APPROXIMATION BY MODIFIED POST-WIDDER OPERATORS

  • Sheetal Deshwal;Rupesh K. Srivastav;Gopi Prasad
    • The Pure and Applied Mathematics
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    • v.30 no.1
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    • pp.67-81
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    • 2023
  • The current article manages with new generalization of Post-Widder operators preserving constant function and other test functions in Bohmann-Korovkin sense and studies the approximation properties via different estimation tools like modulus of continuity and approximation in weighted spaces. The viability of the recently modified operators as per classical Post-Widder operators is introduced in specific faculties also. Numerical examples are additionally introduced to verify our theortical results. In second last section we introduce Grüss-Voronovskaya results and in last section, we show the better approximation our new modified operators via graphical exmaples using Mathematica.